Perhaps it will be a misleading video taking profits without selling your bitcoin. It is not possible, I can't also think of any way that we can take profits if we don't sell it off.
Let us say they have doubled their bitcoin's value because of this bull run, but getting a profits will require you to exchange or sell it off into other coins or into fiat currency.
Hope this may clear it up. Be careful which youtube videos will you gonna believe or not.
Warren Buffet is the richest person on earth amongst all people who made their profit by investing, sure there are others who are richer but they all have a product or a business, Warren Buffet made it with investments. However when it comes to bitcoin he said it was in a bubble, that was about 2 years ago, now we are ten times bigger. So anyone in the world could be wrong about bitcoin, never trust others let alone some youtubers.